2006640479 has 2 divisors, whose sum is σ = 2006640480. Its totient is φ = 2006640478.

The previous prime is 2006640421. The next prime is 2006640481. The reversal of 2006640479 is 9740466002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2006640479 - 2¹² = 2006636383 is a prime.

It is a super-2 number, since 2×2006640479² = 8053212023922698882, which contains 22 as substring.

Together with 2006640481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006640379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003320239 + 1003320240.

It is an arithmetic number, because the mean of its divisors is an integer number (1003320240).

Almost surely, 2^2006640479 is an apocalyptic number.

2006640479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006640479 is an equidigital number, since it uses as much as digits as its factorization.

2006640479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 2006640479 is about 44795.5408383468. The cubic root of 2006640479 is about 1261.3139226856.

The spelling of 2006640479 in words is "two billion, six million, six hundred forty thousand, four hundred seventy-nine".